1. A leery anonymous person who replies to your personal ad for the sole purpose of collecting your pics to inflate his or her poor ego. An encounter with a pic collector is always short and obnoxiously one-sided.

2. A one-liner with no identity or personality. Can't carry a conversation. Trades you pics that aren't even his, then cuts you off not because you're unappealing, but because he really has nothing to offer, not even common courtesy.